Printing-press cylinder.



W. S. WARNOGK.

PRINTING PRESS CYLINDER.

APPLICATION FILED SEPT. s, 1907.

maimed. MMM41 16 if STA'IJES ATE FFICE.

PRINTING-PRESS CYLINDER.

Specification of Letters Patent.

Patented Aug. 1, 1911.

Application filed September 3,1907. Serial No. 391,136.

To all whom it may concern: I

Be it known that I, VVALLAoE S. WARNOCK, citizen .of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Printing-Press Cylinders, of which the following is a full, clear,,concise, and exact description, reference being had to the accompanying 'drawings, forming apart of this specification.

My invention relates to printing presses of the kind employing rotating cylinders or bodies which carry the plates from which the impressions are to. be struck, and has for its object an improvement in the construction of such cylinders.

In accordance with my invention, Igroove the external surface of the plate holding cylinder so that plate holding devices may find lodgment in the grooves of the cylinder. .I know that I am.not the first to groove plate holding cylinders, it having been proposed hitherto to provide two sets of par.- allel slots upon the outer surface of the pl'ate holding cylinder, one set of slots being disposed at right-angles to the other, one set of slots being parallel with the axis of the cylinder and the other set of slots being at right-angles to the axis of the cylinder. In accordance with my invention, I preferably have but one set of slots, and these slots are spirally disposed, whereby .many important advantages are gained over the prior construction above described, among which may be mentioned that by my improved construct-ion, a better lodgment is afforded for the holding devices inserted within the grooves, owing to the directions of the walls of the grooves with respect to the plane of rotation of the cylinder. Moreover, owing to the direction of the slots in the device of my invention, the tendency for the plate to be depressed into the grooves is materially lessened, and, in fact, is practically eliminated with my construction. With the prior constructions, the plates frequently became depressed into the grooves. With my construction there is sure to be suiiicient support at all plate supporting portions of the cylinder, whereas in the prior constructions this assurance was lacking. With prior thicken the plates in order partially to overcome the dangerous tendency of depressing the plates into the grooves. The thickened plates were, of course, produced at increased cost of workmanship and material. By

. plate constructions'it was necessary to means of my invention I an. enabled to employ plates of the same standard of thickness as are employed upon flat bed presses.

I will explain my invention more fully by reference to the accompanying drawing, showing the preferred embodiment thereof, in which- Figure 1 shows a cylinder constructed in accordance with my invention, in elevation, a number of plates being indicated thereupon. Fig. 2 is a sectional'view taken along a portion-ofone of the grooves showing one manner of retaining a printing plate holder in position. Fig. 3 is an end sectional view of the structure shown in Fig. 1. Fig. 4 is an enlarged detail sectional view of the structure as it appears in Fig. 3. Fig. 5 is a longitudinal sectional elevation of one of several forms of printing plate holders that may be disposed within the spiral grooves. Fig. 6 indicates a modification of the structure shown in'Fig. 5.

Like parts are indicated by similar charac'ters of reference throughout the different figures.

The platesupporting cylinder 1 has provided therein a series of spirally disposed grooves 2, there-being desirably but one set of grooves, which grooves are parallel with each other, which are constructed to receive any suitable form of plate holding devices, such as that indicated at 3, for example. In the form of the invention illustrated, each groove is provided with overhanging lips against the action of the spring portion 6;

so that the structure .56 may be contracted may be to permit its insertion within a groove and its removal therefrom. The springstruc ture 56 is carried upon the base 7 of a engaging'hook 8, atleast some of the hooks that engage aplate indicated at 9 in the drawing being adjust-able toward and from the'plate so that said plate may be firmly clamped in position.

I do not herein claim an adjustable hook 2 of clamping hook inorder that the adaptability of myinvention may vbe readily appreciated. v In the'form of register hook illustrated but have illustrated one construction ferred construction,

particularly in Figs. 2 and 5, an opening 10 is provided through the hook or jaw 8 so that a tool may be passed therethrough into engagement with a .worm shaft 11, which worm shaft is in mesh with a worm wheel 12 that carries upon its ends, pinions 13. These with anchorage formations against which the register hooks may work directly or inhave to be continuously disposed directly. I do not wish 'to be limited to the employment of recesses 16 and. the pins 15 for establishing the anchorages against which the clamping hooks may work/By turning the shaft 11, the pinions/13 are caused to travel along the racks 14 so as to force clamping engagement betweenthev jaws 8 and the enga ed plate 9. In order that the plates may be dlsposed at any desired angle upon the cylinders, the jaws 8 are desirably swiveled as illustrated in Fig. 5, and said jaws are desirably provided with two engaging surfaces, so that when moved in one direction, they may engage one plate, and when moved in another direction, they may engage another plate. Where the racks 14 are permanently anchored upon the cylinder, the thrust occasioned by the pinions 13 is directly received by the cylinder. Where the racks are separably disposed, the thrust is received by the cylinder through the agency of the pin 15. It will be seen that by the r provision of the separable racks 14 a 'great amount of machine work is saved, for if the said racks were in fixed relation with the cylinder, as indicated in Fig. 6 they would throughout the lengths of the spiral grooves. As shown in Figs. 4 and 5, the racks 14 are connected to the base 7, with the base slidable thereon to form a unitary structure of base, rack, jaw and gear1ng. The base 7 at its lower portion is provided with a T-formation 20 bed, a traveling engaging into the T-groove 21 formed between the racks 14. It will be seen that the racks 14 act as purchase devices against which the clamps act in clamping the plates.- It will be seen that I have provided a a shou dered grooved.- foundation or bed 1n the form of a cylinder, a printing plate holder having a base adapted to be passed down into a groove in saidplate-holding jaw coming above the foundation, automatically operated spring mechanism adapted to engagestructure 0 the groove, for holding1 the shouldered structure of a groove for holding the jaw in relation to the bed, a.

double rack held in said groove, and means for propelling the plate holder in both directions, said means including two pinions carried upon opposite sides of the base and in engagement with the double rack.

Certain features .of construction herein shown are claimed in my Patent N o. v934,249,

issued September 14th, 1909, plate holders,

my invention, I do not wish to be limited to the precise constructionshown, as changes may readily be made without departing from the spirit thereof, but,

Having thus described my invention, I

claim as new and desire to secure by Letters-Patent the following 1. The combination with a grooved foundation or bed in the form of a cylinder, of aprinting plate holder including a base adapted to be passed down into a groove in said bed, a traveling plate-holding jaw com- 1 ing above thefoundation, automatically op" erated spring mechanism for holding-the jaw in relation to the bed, a rack held in said groove with said base slidably connected to said rack, and means for propelling the plate holder in both directions by engagement with said rack. v

-2. The combination with a shouldered grooved foundation or bed in the form of a cylinder, of a printing plate holder including a base adapted to be passed down i to 21 groove in said bed, a traveling plate-bo l ingjaw coming above the'foundation, mechanism ada' ted to engage the shouldered the jaw in relation to the bed, a rack hel groove, -w1th said base slidably connected to said rack, and means for propelling the 'in said plate holderin both directions by engage 1 went with said rack.

3. The combination with a shouldered grooved foundation orbed in the form-of a cylinder, of a printing plate holderincluda groove in said bed, a traveling plate-holding jaw coming above the foundation, automatically operated mechanism adapted to -engage,, the shouldered. structure of. the groove,i.for holding the jaw in relation tocylinder, of a printing ,plate holder includ- I mg a base'adapted to bepassed down into ing a base ada ted to be passed down into l dation or bed in the form of a cylinder, of a a groove in sai bed, a traveling plate-holding jaw coming above the foundation, auton'iatically operated spring mechanism adapted to engage the shouldered structure of the groove, forholding the jaw in relation to the bed, a rack held in said groove, with said base slidably connected to said rack, and means for propelling the plate holder in both directions by engagement with said rack. v

5. The combination with a grooved foundation or bed in the form of a cylinder, of a printing plate holder 'includlng a base adapted to be passed down into a groovein said bed, a traveling late-holding jaw coming above the foun ation, mechanism for holding the jaw in relation to the bed, a double rack held in said groove, with said base slidably connected to said rack, and means for propelling the plate holder in both directions, said means including two pinions carried upon opposite sides of the has; and in engagement with the double rac 6. The combination with a grooved founprinting plate holder including a base adapted to be passed down into a groove in said bed, a traveling plate-holding jaw coming above the foundation, automatically operated mechanism for holding the jaw 1n relation to the bed, a double rack held in said groove, with said base slidably connected to said rack, and means for propelling the plate holder in both directions, said means including two pinions carried upon opposite sides of the base and in engagement with the double rack.

7. The combination with a grooved foundation or bed in the form of a cylinder, of

' a printing plate holder including a base adapted to be passed down into a groove in said'bed, a traveling plate-holding jaw coming above the foundation, automatically operated spring mechanism for holding the jaw in relation to the bed, a double rack held in said groove, with said base slidably connected to said rack, and means for propolling the plate holder in both directions, said means including two pinions carried upon opposite sides of the base and in engagement with the double rack.

8. The combination with. a shouldered grooved foundation or bed in the form of a cylinder, of a printing plate holder including a base adapted to be passed down into a groove in said bed, a traveling plate-holding jaw coming above the foundation, mechanism adapted to engage the shouldered structure of the groove, for holding the jaw in relation to the bed, a double rack held in said groove, with said base slidably connected to said rack, and means for propelling the plate holder in both directions, said means including two pinions carried upon opposite sides of the base and in engagement with the double rack.

9. The combination with a shouldered grooved foundation or bed in the form of a cylinder, of a printing plate holder including a base adapted to be passed down into a groove in said bed, a traveling plate-holding jaw coming above the foundation. automatically operated mechanism adapted to engage the shouldered structure of the groove, for holding the jaw in relation to the bed, a double rack held in said groove, with said base slidably connected to said rack, and means for propelling the plate holder in both directions, said means including two pinions carried upon opposite sides of the base and in engagement with the A ing a base adapted to be passed down into a groove in said bed, a traveling plate-hold,

ing jaw coming above the foundation, automatically operated spring mechanism adapt-i ed to engage the shouldered structure of the groove, for holding the jaw in relation to the bed, a doublerack held in said groove, with said base slidably connected to said rack, and means forpropelling the plate holder in both directions, said means including two pinions earried upon opposite sides of the .base and in engagementwith the double rack.

' 11. The combination with a grooved foundation or bed in the form of a cylinder, of a printing plate holder including a baseadapted to slide in a groove in said bed, a traveling jaw eoming'above the foundation,

a double rack held in said groove, with said base slidably connected to said rack, and

means for propelling the plate holder in both directions, said means including two pinions carried upon opposite sides of the basle and in engagement with the double rac In witness whereof, I hereunto subscribe myTname this 31st day of August A. D. 190 Y I WALLACE S. WARNOCK.

lVitnesse-s L. G. STROH, G. L. CRAGG.

Gopiesof this patent may be obtained for five cents each, by addressing the Commissioner of rat-eats,

Washington, D. C. 

